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Diplopia is the simultaneous perception of two images of a single object that may be displaced horizontally or vertically in relation to each other. [1] Also called double vision, it is a loss of visual focus under regular conditions, and is often voluntary.
A speech sound disorder ( SSD) is a speech disorder affecting the ability to pronounce speech sounds, which includes speech articulation disorders and phonemic disorders, the latter referring to some sounds ( phonemes) not being produced or used correctly. The term "protracted phonological development" is sometimes preferred when describing ...
A diphthong ( / ˈdɪfθɒŋ, ˈdɪp -/ DIF-thong, DIP-; [ 1] from Ancient Greek δίφθογγος (díphthongos) 'two sounds', from δίς (dís) 'twice' and φθόγγος (phthóngos) 'sound'), also known as a gliding vowel or a vowel glide, is a combination of two adjacent vowel sounds within the same syllable. [ 2] Technically, a ...
Within the chart “close”, “open”, “mid”, “front”, “central”, and “back” refer to the placement of the sound within the mouth. [ 3] At points where two sounds share an intersection, the left is unrounded, and the right is rounded which refers to the shape of the lips while making the sound. [ 4] IPA: Vowels. Front. Central.
The sound of a hard g (which often precedes the non-front vowels a o u or a consonant) is usually the voiced velar plosive [ɡ] (as in gain or go) while the sound of a soft g (typically before i , e , or y ) may be a fricative or affricate, depending on the language. In English, the sound of soft g is the affricate / dʒ /, as in general, giant ...
For the distinction between [ ], / / and , see IPA § Brackets and transcription delimiters. Phonetic transcription (also known as phonetic script or phonetic notation) is the visual representation of speech sounds (or phones) by means of symbols. The most common type of phonetic transcription uses a phonetic alphabet, such as the International ...
The name "G-dropping" is a reference to the way this process is represented in spelling: Since in English / ŋ / is typically spelled ng and / n / is spelled n , the process of replacing / ŋ / with / n / causes the g to "drop" from the spelling. Sociolinguists often refer to this variable by the notation (ing) .
Aphakia. Aphakia is the absence of the lens of the eye, due to surgical removal, such as in cataract surgery, a perforating wound or ulcer, or congenital anomaly. It causes a loss of ability to maintain focus ( accommodation ), high degree of farsightedness ( hyperopia ), [ 1] and a deep anterior chamber. Complications include detachment of the ...